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E. A. HAYES.

'GOVBRING FOR STEAM BOILBRS.

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UNITED STATES PATENT EEETCE.

EDWIN A. HAYES, or NEW vonk, N.- r.

CO'VERING FOR vSTEAM-BOILERS.

' SPECIFICATION forming part of Letters Patent No. 280,470,.dated July 3, 1883,

Application filed September 13, 188:2.

To all whom/ may concern:

Be it known that I, EDWIN A. HAYEs, of the city of New York, and county and State of New York, have invented a new and useful Improve ment in Coverings for Steam-Boilers, Tanks, Pipes, die.; and I do hereby declare the following to` be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figurel represents a plan view of one ofthe sections of which my covering is composed Fig. 2, a longitudinal vertical section of the same on the line x x, Fig. l; Fig. 3, a transverse section on the line y y, Fig. l; Fig. 4, a

modified ysectional View of my connecting device 5 Fig. 5, a view of two sections connected. Figs. 6 and 7 are views of boilers with my improved covering applied thereto.

Similar letters of reference indicate corresponding parts. v

rIhe object of my invention is to provide a suitable covering, that may be easily applied and is readily removed, for boilers, steam-pip es, or other conductors or vessels, for the purpose of protecting them from the action of any exterior cold or heat that may tend to vary the temperature of the material contained within the same.

My invention relates, primarily, to the protection of pipes and boilers containing steam against cold,which, causing a condensation of steam,impairs their usefulness, and also to the construction of a sheet-metal cover that willbe a perfect non-conductor, iire and water proof, and that may be readily removed and replaced without injury when the boiler is to be inspected or repaired, or that may be used again in other places; and to that end it consists in the use ofa sectional covering, the various sections composing the same being constructed of thin metallic sheets, covered with cork or equivalent material, treated so as to be water and fire proof, the extensions of the metallic sheets being provided with suitable devices for connecting the same together, and in other minor details, hereinafter described.

Referring to the drawings, A represents a sheet of sheet brass, tin, galvanized iron, or other suitable material, cut in length readily (No model.)

make a tighter and stronger joint, I usually` bend in hook shape the right-hand extensions of half the sections and the left-hand extensions of the remainder, so that when the covering is put together a hook-extension will come bctween two plain edges, and vice versa, as will be seen by Fig. 5, while the construction of the front and rear edges, or of the longer sides, is

- never varied.

It will be seen that the connecting device consists, essentially, of a tongue and groove, A forming the groove, and A2 the tongue. To

vfacilitate the laying of my covering, I sometimes place the tongue and groove on the ends of the sheet in a horizontal instead of a vertical position, as is seen in Figs. 4 and 7, Where the groove A3 and tongue A4 on` the ends of the sheet A are horizontal, the side extensions, A and A2, remaining always vertical.

B represents a secondary sheet or covering, of cork, cut in sheets to fit the sheet A and laid upon the top ofthe sheet A; and B is a sheet of similar material, placed adj acent to the inner sides of the vertical extensions A2, as is clearly shown in the drawings. The covering B may consist of thin sheets of cork, saturated with a solution of soda or other fire-proof mixture; or it may consist of granulated cork and any adhesive preparation adapted to be rolled in sheet, or of any equivalent substance or compound that is fire and water proof, buoyant, and of light weight. The advantage of using the covering Bis that it can readily be cleaned at intervals, and the ashes, dust, dto., that necessarily gather upon such coverings may be washed off, the difficulty of doing which has proved an objection to other boiler-coverings; and in case the covering becomes wet the saltwater will not damage the same, whereas the coverings heretofore used have been injured and sometimes rendered almost worthless from IOO this cause. The sections A B may be of any desired shape and dimensions, so that they may be readily handled, and are preferably arranged to break joints when in place on the boiler or tank, as is shown in Figs. 6 and 7.

The U-shaped spacing-strips C and the lia-t holding-strips D are made of metal, and lie opposite each other upon the inner and exterior surfaces of the covering A B. The holding- Strip D serves to hold the non-conducting cork sheet B in its place, and the spacing-strip C is for the purpose of keeping the metallic sheet A from lying directly upon the surface of the steam generator or conductor, and the two strips are held together by a metallic screwbolt, E, which goes through the holding-strip D, cork covering B, metal plate A, and spacing-strip C, as shown in Figs. 2, 3, and 4, the various parts being held firmly together by the nut E. By unserewing the nut E and removing the bolt E the spacing-strip C may be readily removed, in case it becomes iiattened down, (thus allowing the sheet A to come too close to the surface ofthe boiler,) and a new spacing strip substituted therefor.

The strip F in Fig. 5, of wood, metal, or other suitable material, is placed against the outside ofthe vertical extensions A when the various sections are j oined, and it is held rigidly thereto by the screw-bolts G,\vhich go through the vertical extensions A A2 and the intermediate cork, B, and when the nuts G are tightened the joints between the sections become air-tight, and no hot air can therefore escape.

The utility of myboiler-covering is increased by the deadair space surrounding the boiler or steam-pipe,which serves to keep the heat in the boiler, and which may be utilized in cooling the boiler by opening the saine to the atmosphere. The strip of felt H is placed in the air-space under the joints ofthe various sections A B, as is shown in Fig. (i.

lllhe construction of the minor parts of my covering may be varied, provided there is no essential departure from the general arrangement of parts shown and described.

The boiler-covering, formed as described, is of economical construction, is easily handled, may be readily taken apart When the boiler is to be inspected, or Whenever it becomes necessary to obtain access to the boilers, and may then be placed in position again, or else may be applied, if desired, to any other boiler. It adds no appreciable Weight to the tank or generator covered, is thoroughly fire and Water proof, is easily cleansed, and is a perfect nonconductor.

Having thus described my invention, what I claim, and desire to secure by Letters Patent in the United States, is-

l. In a boiler-covering composed of sections, the combination, with the metallic sheets A, with extensions forming connecting devices, ol' the secondary cork sheet B, substantially as and for the purpose described.

2. The combination, with the sheets A and covering B, ofthe holding-strips D, as set forth.

3. The eombinatiomwith the sheets A, covering B, holding-strips D, and spacing-strips C, of the bolts E and nut E', as and for the purpose set forth.

4. The combination, with the sheets A and covering B, of the strip F and bolts G, substantially as and for the purpose described.

5. The conibinatiomwith the sheets A, covering B, and spacing-strips C, of the strip of' felt H, substantially as described.

EDXYIN A. HAYES.

lVil'n esses:

GEORGE Divrxn, J. O. FoWLnR, Jr. 

